CN217124439U

CN217124439U - H-shaped electric drive axle and pneumatic tyre roller

Info

Publication number: CN217124439U
Application number: CN202121435823.9U
Authority: CN
Inventors: 刘吉安; 杜斌; 魏准
Original assignee: Hunan Sanyi Huayuan Machinery Co
Current assignee: Hunan Sanyi Huayuan Machinery Co
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-08-05
Anticipated expiration: 2031-06-25

Abstract

The utility model relates to an electric drive axle technical field, its purpose provides a H type electric drive axle and tire road roller, and the integrated level is high, compact structure is reasonable, promote space utilization greatly. Above-mentioned H type electric drive axle includes axle housing (1), motor stator (201), electric motor rotor (202), speed reducer (3) and stopper (4), axle housing (1) is the bilateral symmetry structure, motor stator (201) electric motor rotor (202) with stopper (4) set up in axle housing (1), the both ends of electric motor rotor (202) with be located axle housing (1) outside speed reducer (3) coaxial coupling, just at least one end of electric motor rotor (202) is passed through stopper (4) coaxial coupling speed reducer (3). The utility model provides a current electric drive axle structure complicated, not compact, the great problem of occupation space.

Description

H-shaped electric drive axle and pneumatic tyre roller

Technical Field

The utility model relates to an electric drive axle technical field, concretely relates to H type electric drive axle and tire road roller.

Background

An electric drive axle is a mechanism located at the end of a transmission system and used for transmitting the rotating speed and torque of a drive motor to a drive wheel, and generally comprises the drive motor, a speed reducer, a differential, a wheel transmission device, a drive axle housing and the like.

At present, an integrated motor drive axle has two arrangement modes, one is that the axis of a drive motor is arranged in parallel with the axis of an output shaft, and the other is that the axis of the drive motor is arranged coaxially with the axis of the output shaft. The mode that the axis of driving motor and the axis of output shaft are arranged in parallel has complicated structure and large occupied space, and is not suitable for the engineering machinery with smaller tire spacing. The structure of the drive axle driven by the motor is relatively compact, as disclosed in chinese patent document CN101348075A, the drive axle mainly includes a motor, a differential, a first planetary gear reducer and a second planetary gear reducer, the motor is disposed in the middle of the drive axle, one end of the motor is coaxially connected with the first planetary gear reducer, the other end is coaxially and sequentially connected with the differential and the second planetary gear reducer, a brake device is disposed between the differential and the second planetary gear reducer, and the service brake system and the parking brake system are integrated.

Although the axle of the driving motor and the axle of the output shaft are arranged coaxially in the electric drive axle disclosed in the above-mentioned document, the electric drive axle is provided with a half shaft, a central shaft and other mechanisms, and the braking device is arranged outside the axle housing, so that the structure of the electric drive axle is relatively complex, and the parts for realizing the service braking and the parking braking in the braking device are two different sets of assemblies, so that the structure of the braking device is complex, the number of parts is large, and the structure of the electric drive axle is further complex, not compact enough, and the occupied space is relatively large.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model discloses the technical problem that solves or improve lies in overcoming the more complicated, the not compact enough, the great defect of occupation space of structure of electric drive axle among the prior art to provide an integrated level height, compact structure is reasonable, promote space utilization's H type electric drive axle and tire road roller greatly.

In order to solve the problem, the utility model provides a H type electric drive axle, including axle housing, motor stator, electric motor rotor, speed reducer and stopper, the axle housing is bilateral symmetry structure, motor stator electric motor rotor with the stopper set up in the axle housing, electric motor rotor's both ends with be located the axle housing is outside speed reducer coaxial coupling, just electric motor rotor's at least one end is passed through stopper coaxial coupling the speed reducer.

Preferably, the brake comprises a brake housing, and a transmission shaft and a brake control mechanism arranged in the brake housing; one end of the transmission shaft is connected with the motor rotor, and the other end of the transmission shaft is connected with the speed reducer; the circumference of transmission shaft is provided with and follows transmission shaft axial displacement and a plurality of rotor at interval each other, stopper shell inner wall is provided with and follows transmission shaft axial displacement and a plurality of stators at interval each other, the stator with rotor cross arrangement, the stator with braking control mechanism contacts.

Preferably, a motor housing is arranged in the axle housing, and the motor stator and the motor rotor are arranged in the motor housing;

the brake control mechanism comprises a brake piston, one end of the brake piston is in contact with the stator, the other end of the brake piston is provided with a compression elastic component between the motor shell, and a brake releasing cavity is formed between the outer wall of the brake piston and the brake shell.

Preferably, the compression elastic part is a plurality of braking compression springs which are uniformly arranged along the circumferential direction of the braking piston.

Preferably, the axle housing comprises two sealingly connected axle housing halves.

Preferably, a cooling flow passage is arranged between the motor stator and the axle housing.

Preferably, the H-shaped electric drive axle is provided with a ventilation pipeline on the axis.

Preferably, the speed reducer adopts a two-stage planetary speed reducer.

The tyre roller with the H-shaped electric drive axle comprises two front wheel units and two rear wheel units, wherein the front wheel units and/or the rear wheel units are driven by the H-shaped electric drive axle.

Preferably, the front wheel unit and the H-shaped electric drive axle form a front drive unit, a transition support is arranged in the middle of an axle housing of the H-shaped electric drive axle in the front drive unit, and the transition supports of the two front drive units are connected through a grouping bogie.

The utility model provides a H type electric drive axle and tire road roller, stopper set up in the axle housing, and the at least one end of electric motor rotor passes through stopper coaxial coupling speed reducer, does not have other redundant parts, has greatly optimized the structure of electric drive axle, and the stopper sets up in the axle housing moreover, has improved the integrated level of electric drive axle, makes its structure compacter, reasonable, has promoted space utilization greatly, the utility model discloses an H type electric drive axle can arrange in a flexible way on tire road roller front and back wheel assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic overall structure diagram of an H-type electric drive axle of the present invention;

fig. 2 shows a schematic diagram of a speed reducer in an H-type electric drive axle according to the present invention;

fig. 3 shows a schematic view of a brake in an H-shaped electric drive axle according to the present invention;

fig. 4 shows a schematic diagram of a pneumatic tyre roller with an H-shaped electric drive axle according to the present invention;

fig. 5 shows a schematic view of two front drive units in a pneumatic tyre roller with an H-shaped electric drive axle according to the invention;

FIG. 6 shows a schematic view of the transition leg and the ganged bogie of FIG. 5;

fig. 7 shows a schematic view of two rear drive units in a pneumatic tyre roller with an H-shaped electric drive axle according to the present invention.

Description of the reference numerals:

1-axle housing, 101-cooling flow channel;

201-motor stator, 202-motor rotor, 203-motor housing, 204-bearing;

3-speed reducer, 301-fixed gear ring, 302-first stage planetary reduction mechanism planet carrier, 303-first stage planetary reduction mechanism planet wheel, 304-second stage planetary reduction mechanism sun wheel, 305-speed reducer shell, 306-second stage planetary reduction mechanism planet wheel, 307-heavy load bearing, 308-bearing, 309-rim mounting surface;

4-brake, 401-brake housing, 402-transmission shaft, 403-moving plate, 404-static plate, 405-brake piston, 406-brake releasing cavity, 407-brake compression spring;

5-an air duct; 6-tyre; 7-a precursor unit; 8-a rear drive unit; 9-a transition scaffold; 10-group bogie, 11-follow wheel and 12-connecting frame.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, it is a preferred embodiment of the H-shaped electric drive axle of the present invention.

The utility model discloses a H type electric drive axle includes axle housing 1, motor stator 201, electric motor rotor 202, speed reducer 3 and stopper 4. The axle housing 1 is of a bilateral symmetry structure and is used for bearing and mounting components. Axle housing 1 is a airtight casing, has two axle housing parts, and two axle housing parts pass through bolt or other mode fixed connection together, form the axle housing, and sealing connection between two axle housing parts is specific moreover, is equipped with sealing material between two axle housing parts, makes axle housing 1 form an airtight space. After the axle housing is assembled, the axle housing has two rim mounting surfaces 309 which are symmetrical left and right.

Motor stator 201, electric motor rotor 202 and stopper 4 set up in axle housing 1, have cooling flow channel 101 between motor stator 201 and the axle housing 1, are equipped with the coolant liquid in the cooling flow channel 101, and the coolant liquid flows in the axle housing, carries out effectual cooling to electric motor rotor and motor stator.

The motor rotor 202 is coaxially installed in the motor stator 201, two ends of the motor rotor 202 are connected with the axle housing 1 through the bearing 203, an inner ring of the bearing 203 is tightly matched with the motor rotor 202, and an outer ring of the bearing 203 is in transition fit with the axle housing 1.

The two ends of the motor rotor 202 are coaxially connected to a speed reducer 3 located outside the axle housing 1, and at least one end of the motor rotor 202 is coaxially connected to the speed reducer 3 through a brake 4, in this embodiment, one end of the motor rotor 202 (i.e., the left end of the motor rotor 202 in fig. 1) is coaxially connected to the speed reducer 3 through the brake 4 (for convenience of drawing, the structure of the brake in fig. 1 is abbreviated as "abbreviated drawing", and the specific structure of the brake is shown in fig. 3), the other end of the motor rotor 202 (i.e., the right end of the motor rotor 202 in fig. 1) is directly and coaxially connected to the speed reducer 3, further, a seal is maintained between the right end of the motor rotor 202 and the axle housing 1, and a transmission shaft output end of the brake 4 and the right end of the motor rotor 202 are equipped with gears (not shown in the figure) as input of the speed reducer.

In this embodiment, the speed reducer 3 is a two-stage planetary speed reducer, and the two-stage planetary speed reducer has the characteristics of large reduction ratio, large output torque, and strong bearing capacity. In this embodiment, the left end of the motor rotor 202 is coaxially connected to the two-stage planetary reducer through the brake 4, the right end of the motor rotor 202 extends out of the axle housing 1 and is directly coaxially connected to the two-stage planetary reducer, the gear fixed to the output end of the transmission shaft of the brake 4 and the motor rotor 202 serves as a sun gear of the first-stage planetary reducer of the reducer to drive the reducer to operate, and the output of the motor can realize torque increase and speed reduction through two-stage reduction.

Specifically, as shown in fig. 2, the speed reducer has a speed reducer housing 305, a fixed ring gear 301 is provided in the speed reducer housing 305, one end of the fixed ring gear 301 is fixedly connected to the brake housing or the axle housing 1 through a flange surface (speed reducer mounting surface), the other end serves as a second-stage planetary reduction mechanism carrier, the fixed ring gear 301 also serves as a first-stage planetary reduction mechanism ring gear, a first-stage planetary reduction mechanism carrier 302 and a first-stage planetary reduction mechanism planetary gear 303 are provided in the middle of the fixed ring gear 301, the first-stage planetary reduction mechanism carrier 302 serves as an output end of the first-stage planetary reduction mechanism and is fixedly connected to a second-stage planetary reduction mechanism sun gear 304, a bearing 308 is provided between the second-stage planetary reduction mechanism sun gear 304 and the fixed ring gear 301, the second-stage planetary reduction mechanism planetary gear 306 is mounted on the other end of the fixed ring gear 301, i.e. the second-stage planetary reduction mechanism carrier, the reducer case 305 also serves as a second-stage planetary reduction gear ring gear, and is the output end of the entire reducer. A heavy-duty bearing 307 is also provided between the fixed ring gear 301 and the reducer housing 305.

A flange surface, namely a rim mounting surface 309, is provided on the speed reducer housing 305, and the rim is directly mounted on the rim mounting surface 309 by bolts.

As shown in fig. 3, in the present embodiment, a motor housing 203 is provided inside the axle housing 1, and a motor stator 201 and a motor rotor 202 are provided inside the motor housing 203.

In this embodiment, the brake is a multi-disc brake. The brake 4 includes a brake housing 401, and a drive shaft 402 and a brake control mechanism provided in the brake housing 401. One end of the brake housing 401 is fixedly connected with the motor housing 203, and the other end is fixedly connected with the axle housing 1.

One end of the transmission shaft 402 is connected with the motor rotor 202, and the other end is connected with the speed reducer 3. The circumference of transmission shaft 402 is provided with a plurality of rotor 403 that can move along transmission shaft 402 axial and separate each other, and the stopper shell 401 inner wall is provided with a plurality of stator 404 that can move along transmission shaft 402 axial and separate each other, and stator 404 and rotor 403 are alternately arranged, and stator 404 and braking control mechanism contact.

The brake control mechanism comprises a brake piston 405, one end of the brake piston 405 is in contact with the stator 404, a compression elastic component is arranged between the other end of the brake piston 405 and the motor shell 203, and a brake release cavity 406 is arranged between the outer wall of the brake piston 405 and the brake shell 401. In this embodiment, the compression elastic component is a plurality of brake compression springs 407, the brake compression springs 407 are uniformly arranged along the circumferential direction of the brake piston 405, one end of each brake compression spring 407 is in contact with the motor housing 203, the other end of each brake compression spring 407 is in contact with the brake piston 405, and the brake compression springs 407 have a certain compression amount, so that the static plate 404 and the dynamic plate 403 can be tightly pressed together to provide a required braking force.

The release brake chamber 406 is controlled by one of an electromagnetic force driver, a hydraulic cylinder and a pneumatic cylinder. In this embodiment, the brake release chamber 406 is controlled by an oil cylinder, after the brake release chamber 406 can be filled with pressure oil, the brake piston 405 further compacts the brake spring, so that the positive pressure between the stator plate 404 and the rotor plate 403 is reduced until the brake spring is completely released, at this time, the vehicle is in a normal driving state without brake force, the brake force of the brake can be controlled by controlling the pressure in the brake release chamber 406, and when the pressure in the brake release chamber 406 is zero, parking can be achieved.

Therefore, the utility model discloses stopper among the H type electric drive axle only needs the control pine to stop the pressure in the chamber 406, can accomplish service braking or parking braking, and the executive component who accomplishes service braking moreover is the same with the executive component who accomplishes parking braking completely, does not have other redundant structure, and the design concept is ingenious, and compact structure is reasonable. Compared with the prior art, the utility model discloses stopper structure among the H type electric drive axle is optimized more, compact, and reasonable in design has further reduced the overall dimension of H type electric drive axle, makes the utility model discloses an H type electric drive axle is applicable to the less engineering machine tool of tire interval very much, can let whole car arrange more in a flexible way.

In addition, the H-shaped electric drive axle can realize electromagnetic braking and kinetic energy recovery by controlling the current direction of the motor, so that the driving braking force of the H-shaped electric drive axle is increased. Through motor kinetic energy recovery and brake force control of the brake, the maximum brake torque of the vehicle can be greatly improved. Under the common working condition, the kinetic energy of the motor is recovered, so that energy conservation can be realized.

An air duct 5 is arranged on the axis of the H-shaped electric drive axle, the air duct 5 penetrates through the axis of the H-shaped electric drive axle, the port of the air duct 5 is arranged on the speed reducer shell and can move relative to the speed reducer shell, and the air duct 5 is used for arranging a centralized inflation pipeline.

As shown in fig. 4 to 7, the present embodiment also provides a pneumatic roller having the above H-shaped electric drive axle, which includes two front wheel units and two rear wheel units, each front wheel unit includes two tires 6, and each rear wheel unit also includes two tires 6, and in addition, a follower wheel 11 is disposed between the two rear wheel units in the present embodiment. In this embodiment, front wheel unit and rear wheel unit are all driven by H type electric drive axle for front wheel unit and rear wheel unit all possess the driving capability, and the climbing ability of improvement pneumatic tyre roller that can be very big is favorable to reducing pneumatic tyre roller's oil consumption moreover.

The front wheel unit and the H-shaped electric drive axle form a front drive unit 7, that is, the pneumatic tyre roller of this embodiment has two front drive units 7, and similarly, the rear wheel unit and the other H-shaped electric drive axle form a rear drive unit 8, that is, the pneumatic tyre roller of this embodiment has two rear drive units 8. A transition support 9 is arranged in the middle of an axle housing 1 of an H-shaped electric drive axle in the front drive unit 7, the transition supports 9 of the two front drive units 7 are connected through a grouping bogie 10, namely, the two ends of the grouping bogie 10 are respectively connected with the transition supports 9 of the two front drive units 7, so that connection is realized. The rear drive units 8 are connected through a connecting frame 12.

The utility model provides a work process of pneumatic tyre roller with H type electric drive axle is:

1) when the H-shaped electric drive axle generates driving force, the driving motor is electrified to rotate, and then the speed and torque are reduced and increased through the speed reducers on the left side and the right side to drive the tires to rotate, so that the driving force is generated;

2) during deceleration, firstly, the motor generates braking torque in the process of recovering kinetic energy, and then the deceleration of the vehicle is controlled by controlling the braking force of the brake;

3) after the vehicle stops, the air pressure or the hydraulic pressure in the brake is removed, and the brake compression spring in the brake rebounds to clamp the moving plate and the static plate of the brake to realize parking brake.

The utility model provides a have H type electric drive axle can be applied to on the hybrid or pure electric tire machine that has the driving force of full round. And, in other embodiments, for saving the cost, can only set up at front wheel unit or rear wheel unit the utility model discloses an H type electric transaxle realizes the drive.

In other embodiments, the ventilation duct 5 may not be provided on the axis of the H-shaped electric drive axle.

In other embodiments, when the axle housing internal space allows, the two ends of the motor rotor 202 can be coaxially connected with the speed reducer 3 through the brake 4, so that the braking effect is better.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. An H-shaped electric drive axle is characterized in that: including axle housing (1), motor stator (201), electric motor rotor (202), speed reducer (3) and stopper (4), axle housing (1) is the bilateral symmetry structure, motor stator (201) electric motor rotor (202) with stopper (4) set up in axle housing (1), the both ends of electric motor rotor (202) with be located axle housing (1) is outside speed reducer (3) coaxial coupling, just the at least one end of electric motor rotor (202) is passed through stopper (4) coaxial coupling speed reducer (3).

2. The H-shaped electric drive axle according to claim 1, wherein: the brake (4) comprises a brake housing (401), and a transmission shaft (402) and a brake control mechanism which are arranged in the brake housing (401); one end of the transmission shaft (402) is connected with the motor rotor (202), and the other end of the transmission shaft is connected with the speed reducer (3); the circumference of transmission shaft (402) is provided with can follow transmission shaft (402) axial displacement and a plurality of rotor (403) at intervals each other, stopper shell (401) inner wall is provided with can follow transmission shaft (402) axial displacement and a plurality of stator (404) at intervals each other, stator (404) with rotor (403) cross arrangement, stator (404) with braking control mechanism contact.

3. The H-shaped electric drive axle according to claim 2, characterized in that: a motor shell (203) is arranged in the axle housing (1), and the motor stator (201) and the motor rotor (202) are arranged in the motor shell (203);

the braking control mechanism comprises a braking piston (405), one end of the braking piston (405) is in contact with the stator (404), a compression elastic part is arranged between the other end of the braking piston and the motor shell (203), and a releasing braking cavity (406) is arranged between the outer wall of the braking piston (405) and the brake shell (401).

4. The H-shaped electric drive axle according to claim 3, characterized in that: the compression elastic component is a plurality of brake compression springs (407), and the brake compression springs (407) are uniformly arranged along the circumferential direction of the brake piston (405).

5. H-shaped electric drive axle according to claim 4, characterized in that: the axle housing (1) comprises two hermetically connected axle housing sub-parts.

6. The H-shaped electric drive axle according to claim 1, wherein: and a cooling flow channel (101) is arranged between the motor stator (201) and the axle housing (1).

7. The H-shaped electric drive axle according to claim 6, wherein: the H-shaped electric drive axle is provided with a ventilation pipeline (5) on the axis.

8. The H-shaped electric drive axle according to claim 1, wherein: the speed reducer (3) adopts a two-stage planetary speed reducer.

9. A tyre roller having an electric drive axle of the H-type according to any one of claims 1 to 8, characterized in that: the electric vehicle comprises two front wheel units and two rear wheel units, wherein the front wheel units and/or the rear wheel units are driven by the H-shaped electric drive axle.

10. A tyre roller as claimed in claim 9, wherein: the front wheel unit and the H-shaped electric drive axle form a front driving unit (7), a transition support (9) is arranged in the middle of an axle housing (1) of the H-shaped electric drive axle in the front driving unit (7), and the transition supports (9) of the two front driving units (7) are connected through a grouping bogie (10).